Peak flow meter



FIG. 1 is top view of the peak flow meter;

FIG. 2 is a front elevational view of the peak flow meter;

FIG. 3 is a side elevational view of the peak flow meter, the opposingside view is a mirror image of that shown in FIG. 3;

FIG. 4 is a back, perspective view of the peak flow meter; and,

FIG. 5 is a front, perspective view of the peak flow meter.

The ornamental design for a peak flow meter, as shown and described.